CW — short for Continuous Wave — is what amateur radio operators call Morse code. The name comes from the transmission method: a carrier wave keyed on and off in precise patterns to produce dots and dashes. It is the oldest mode in amateur radio and, by most measures, still one of the most useful.
This is a guide to getting started. Whether you are newly licensed or not yet licensed but curious, here is what you need to know about Morse code in ham radio — the practical version, not the romanticised one.
Why CW Still Matters in 2026
The honest answer: for several technical reasons that voice simply cannot replicate.
A Morse signal occupies roughly 150 Hz of radio spectrum. A voice SSB signal needs about 2,700 Hz. On crowded shortwave bands — where dozens of stations fight for space in a limited frequency range — CW fits where voice cannot. This is not a theoretical advantage. On 40 metres during a busy evening, you will find CW contacts being made in gaps where voice stations would completely overlap and obliterate each other.
At low power levels, the gap becomes even more significant. A 5-watt CW signal can reliably make transatlantic contacts that a 5-watt voice signal cannot. This is the appeal of QRP (low power) operation — running on battery power from a backpack in a field, making contacts across thousands of miles on a transmitter no larger than a paperback book. Voice at that power level struggles. CW thrives.
There is also the noise floor issue. A CW signal can be copied when its signal-to-noise ratio is far below what voice requires. Experienced operators can decode Morse from signals that are almost completely buried in static. No voice system can do this.
The Equipment You Need
You do not need much to get started with CW:
- An HF transceiver — any modern HF radio includes CW mode. It is a standard feature, not an add-on. Used radios like the Yaesu FT-817 or Icom IC-7300 are popular choices for new CW operators.
- A key — this is the device you use to send Morse. A straight key is the simplest: press down for a dot or dash, release for the gap. Most new operators start here. A paddle (iambic keyer) is faster once you have the basics, but has a steeper learning curve.
- A keyer — for paddle operation, most transceivers include a built-in electronic keyer that generates precise dot and dash timing. This matters at speeds above 15 WPM where manual timing becomes difficult to control.
- Antenna — the same antenna you use for voice will work for CW. A simple wire dipole for 40m or 20m is sufficient for getting started.
CW Operating Frequencies
CW is allocated specific sub-bands within each amateur frequency range. The ITU and national regulators set these allocations. In the US (FCC Part 97), the main CW sub-bands are:
- 160m — 1.800–2.000 MHz (CW at lower end)
- 80m — 3.500–3.600 MHz
- 40m — 7.000–7.125 MHz — one of the most active bands for CW globally
- 20m — 14.000–14.150 MHz — the international DX (long distance) band
- 15m — 21.000–21.200 MHz
- 10m — 28.000–28.300 MHz
For beginners, 40m is the most forgiving. It is active at all times of day, propagation is reliable, and experienced operators expect newcomers. The calling frequency convention is to listen before transmitting — if you hear someone already there, find a clear frequency first.
A Standard CW Contact (QSO)
A typical first contact looks something like this:
W1ABC: CQ CQ CQ DE W1ABC W1ABC K
G3XYZ: W1ABC DE G3XYZ G3XYZ AR
W1ABC: G3XYZ DE W1ABC GM UR 579 579 QTH BOSTON MA NAME JOHN JOHN BK
G3XYZ: R TNX JOHN 599 599 QTH LONDON NAME MIKE MIKE BK
W1ABC: TNX MIKE FB QSO 73 DE W1ABC SK
Translated: W1ABC calls CQ (any station, please respond). G3XYZ responds. W1ABC sends a signal report (579 = readable, good strength, good tone), location, and name. G3XYZ responds with their report and details. W1ABC closes with 73 (best regards) and SK (end of contact).
The whole exchange might take three minutes at 15 WPM. It covers enough information for a proper log entry. The Abbreviations page has the full list of Q-codes and prosigns used in CW contacts.
How Fast Do You Need to Be?
The minimum for a comfortable first contact is about 12 words per minute. Below 10 WPM, the gaps between characters become long enough that both operators lose concentration. Above 15 WPM, contacts flow naturally. Most experienced operators sit between 20 and 25 WPM. Contest operators routinely push past 30 WPM, with some exceeding 40 WPM during pile-ups.
You do not need to reach any specific speed before making your first contact. Many operators make their first QSO at 8–10 WPM by sending QRS (please slow down) — most operators will slow to accommodate. The ham radio community is generally patient with newcomers learning CW.
Essential Abbreviations to Learn First
CW contacts use standardised shorthand developed during the telegraph era. Learn these before going on air — they appear in almost every exchange:
- CQ — calling any station (general call)
- DE — from (precedes callsign)
- K — over (any station respond)
- AR — end of message
- SK — end of contact
- 73 — best regards
- 88 — love and kisses (used between friends)
- RST — signal report (Readability 1–5, Strength 1–9, Tone 1–9)
- QTH — location
- QRM — interference from other stations
- QSB — signal fading
- QRS — please send more slowly
- QRN — atmospheric noise
- QRP — low power operation (under 5 watts)
The complete list is on the Abbreviations page — including prosigns, Q-codes, and common contest exchanges.
How to Build Speed — Practically
Most people plateau around 8–10 WPM and stay there for months. The reason is almost always the same: they are practising too slowly.
The Koch method — the most validated approach for reaching conversational speed — says to practise at your target speed from day one, not your comfortable speed. If you want to operate at 15 WPM, practise at 15 WPM even if your accuracy is only 40% at first. Accuracy follows repetition at speed. Practising slowly builds slow habits that are genuinely hard to break.
The Two-Button Practice mode on this site simulates a paddle keyer in software — left button is dot, right is dash. It is the closest thing to on-air sending practice without a radio. The timed Quiz builds receive speed under slight pressure — the same conditions as copying on air. Run it at Level 3 and above once you have the alphabet solid.
For receive practice, tune around the CW sub-bands and copy what you hear without sending. Start with slow stations — look for QRS in their CQ. The Morse Code Translator lets you type any phrase and hear it played at any WPM — useful for training your ear on specific abbreviations or callsign patterns.
CW Contests and Awards
Some of the largest amateur radio contests are CW-only or have CW categories. The CQ World Wide CW Contest (last weekend of November) is one of the biggest sporting events in amateur radio — operators try to contact as many stations and countries as possible in 48 hours, all in Morse. Exchange speeds during the contest routinely exceed 30 WPM.
The ARRL sponsors several CW-specific achievement awards. The DXCC award — for contacting stations in 100 or more countries — is actively pursued in CW because CW contacts are possible in conditions where voice fails. Many DXpeditions to rare islands and remote locations operate CW for this reason.
The History of the Morse Code Requirement in Ham Radio
For most of amateur radio's history, proving Morse code proficiency was required to obtain any licence that allowed HF operation. In the US, the General class and Amateur Extra class required demonstrating 13 words per minute receive speed — tested by copying a plain-language passage and then answering questions about its content.
The FCC reduced the requirement to 5 WPM for all classes in 1990, then eliminated it entirely in February 2007 following an ITU recommendation. The change was divisive. Many long-time operators felt the test served as a meaningful filter — learning Morse code takes genuine effort, and that effort correlated with serious engagement in the hobby. Others argued it excluded people with genuine interest but physical difficulty with the code.
The result surprised many observers: more licensed operators overall, and — paradoxically — renewed interest in CW among those who choose to learn voluntarily. Learning something because you want to is a different experience from learning it because you must. The community of CW operators in 2026 is smaller than its peak but arguably more enthusiastic.
Digital Modes vs CW — A Realistic Comparison
Modern digital modes like FT8, JS8, and PSK31 have some technical advantages over CW: they work at even lower signal-to-noise ratios, they can be decoded by software without operator skill, and they allow near-automatic contacts across the globe.
FT8 in particular has become enormously popular for weak-signal DX work since its release in 2017. Some operators use it exclusively.
But CW has advantages that digital modes do not. A CW contact is a real-time human conversation — you hear the other person's fist (their keying style), you can improvise and go off-script, you can have actual exchanges rather than automated signal reports. There is a reason experienced operators describe their first real CW QSO as a different kind of experience from their first FT8 contact. One is a skill demonstration. The other is a conversation.
The Abbreviations page covers the Q-codes and prosigns shared between CW and digital modes. The Morse Code Translator lets you hear any phrase played at any speed — useful for learning how QSO exchanges sound before you try to copy them on air.
Getting Your First Licence
In the US, the Technician licence requires passing a 35-question multiple choice exam on basic regulations, operating practices, and electronics. No Morse code test. Study materials are free from the ARRL and from sites like HamStudy.org. Most people pass after two to four weeks of studying.
The General class adds HF privileges — including access to the CW sub-bands on 40m, 20m, and other bands where most CW activity happens. The exam is slightly harder but still multiple choice. Many operators upgrade within their first year.
Once licensed, getting on CW requires only a transceiver with CW mode, a key, and an antenna. The Learn page on this site handles the Morse training side. The Two-Button Practice mode is the closest software equivalent of actual keying practice available without a radio.